/**
 * Copyright 2006-2016 the original author or authors.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.mybatis.generator.config;

import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.XmlElement;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;

import static org.mybatis.generator.internal.util.StringUtility.stringHasValue;
import static org.mybatis.generator.internal.util.messages.Messages.getString;

public class IgnoredColumnPattern {

    private String patternRegex;
    private Pattern pattern;
    private List<IgnoredColumnException> exceptions = new ArrayList<IgnoredColumnException>();

    public IgnoredColumnPattern(String patternRegex) {
        this.patternRegex = patternRegex;
        pattern = Pattern.compile(patternRegex);
    }

    public void addException(IgnoredColumnException exception) {
        exceptions.add(exception);
    }

    public boolean matches(String columnName) {
        boolean matches = pattern.matcher(columnName).matches();

        if (matches) {
            for (IgnoredColumnException exception : exceptions) {
                if (exception.matches(columnName)) {
                    matches = false;
                    break;
                }
            }
        }

        return matches;
    }

    public XmlElement toXmlElement() {
        XmlElement xmlElement = new XmlElement("ignoreColumnsByRegex");
        xmlElement.addAttribute(new Attribute("pattern", patternRegex));

        for (IgnoredColumnException exception : exceptions) {
            xmlElement.addElement(exception.toXmlElement());
        }

        return xmlElement;
    }

    public void validate(List<String> errors, String tableName) {
        if (!stringHasValue(patternRegex)) {
            errors.add(getString("ValidationError.27",
                    tableName));
        }
    }
}
